Le 14/02/2016 21:40, Denis Kirjanov a écrit :
On 2/11/16, Christophe Leroy <christophe.le...@c-s.fr> wrote:
This patch provides VIRT_CPU_ACCOUTING to PPC32 architecture.
PPC32 doesn't have the PACA structure, so we use the task_info
structure to store the accounting data.
In order to reuse on PPC32 the PPC64 functions, all u64 data has
been replaced by 'unsigned long' so that it is u32 on PPC32 and
u64 on PPC64
Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
Doesn't build for me with the patch applied
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
GEN .version
CHK include/generated/compile.h
UPD include/generated/compile.h
CC init/version.o
LD init/built-in.o
drivers/built-in.o: In function `get_cpu_idle_time':
(.text+0x1261c4): undefined reference to `__umoddi3'
drivers/built-in.o: In function `get_cpu_idle_time':
(.text+0x1261e0): undefined reference to `__udivdi3'
Makefile:936: recipe for target 'vmlinux' failed
make: *** [vmlinux] Error 1
Looks like you have CONFIG_CPU_FREQ, which I don't have.
The issue comes from the jiffies64_to_cputime64() defined in
arch/powerpc/include/asm/cputime.h :
static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
{
u64 ct;
u64 sec;
/* have to be a little careful about overflow */
ct = jif % HZ;
sec = jif / HZ;
On 32 bits, 64 bits % and / require __udivdi3() and __umoddi3(), which
are not implemented in the kernel.
As HZ fits in 32 bits, the solution is to use do_div(). I should not
change anything on PPC64 and would solve your issue.
I will submit an update of the patch within an hour.
Christophe
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